High-temperature deformation-resistant antique glaze ceramic and method for preparing the same

Abstract

The present application relates to the field of ceramic and its preparation method, in particular to a kind of high-temperature deformation resistance antique glaze ceramic and its preparation method, the surface of body is covered with matte glaze and fading glaze in turn, the content of alkali metal and alkaline earth metal impurities in sintered mullite contained in body is higher, can significantly improve the deformation resistance of body, the composite additive of sintered mullite, white corundum and magnesium oxide can improve the proportion of mullite phase in body, thereby improving the strength of body, and can improve the adaptability of body glaze, avoid the body high-temperature sintering cracking deformation, and improve the yield; its glaze surface is antique yellow glaze surface base color, and white fading texture is formed on it by acid liquid aging, has the glaze surface effect of antique aging, and by special glazing method, the full glaze rate of glaze surface is high, and it is used as ceramic artware, and has unique artistic aesthetic feeling.

Description

Technical Field

[0001] The present invention relates to the field of ceramics and preparation methods thereof, and in particular to high-temperature deformation-resistant antique glaze ceramics and a preparation method thereof. Background Art

[0002] During the firing process, ceramics may have some defects, such as cracking of the body and cracking of the glaze. Cracking indicates that there are cracks in the porcelain in the kiln, also known as kiln cracking. There are many reasons for cracking, most of which are mainly due to excessive heating or cooling during firing. In order to solve the problem of body cracking, in addition to controlling the heating and cooling rates, it is also necessary to improve the body's resistance to high-temperature deformation. In addition, existing antique glazed ceramic crafts are mainly made by wood firing, which requires the consumption of a large amount of wood and has high carbon emissions. In view of this, this case was created. Summary of the Invention

[0003] An object of the present invention is to solve at least the above problems by providing high-temperature deformation-resistant antique glaze ceramics and a method for preparing the same.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: high-temperature deformation-resistant antique glaze ceramics include a body, the surface of which is covered with matte glaze and fading glaze in sequence.

[0005] Preferably, the raw materials of the green body include the following components in parts by weight: 50-60 parts of clay, 15-20 parts of potassium feldspar, 8-10 parts of sintered mullite, 5-7 parts of white corundum, 3-5 parts of magnesium oxide, 4-5 parts of iron oxide, and 4-5 parts of rutile.

[0006] Preferably, the raw materials of the matte glaze include the following components in parts by weight: 20-25 parts of potassium feldspar, 5-8 parts of limestone, 25-30 parts of kaolin, 10-12 parts of lead oxide, 4-6 parts of tin dioxide, and 15-18 parts of quartz; the raw materials of the fading glaze include the following components in parts by weight: 20-25 parts of copper oxide, 10-12 parts of silicon dioxide, 10-12 parts of kaolin, and 15-20 parts of potassium feldspar.

[0007] The method for preparing the high-temperature deformation-resistant antique glaze ceramic comprises the following steps:

[0008] Step a, forming and drying the green container;

[0009] Step b, applying matte glaze on the surface of the green body and drying it;

[0010] Step c: locally applying a faded glaze on the matte glaze and drying it;

[0011] Step d, firing in a kiln;

[0012] Step e: applying acid to the glaze surface for aging treatment, and then cleaning to obtain a ceramic product.

[0013] Preferably, in the step a, after the blank is formed, the inner side surface of the ring foot at the bottom of the blank is trimmed, and after trimming, the inner side surface of the ring foot has an inclined slope.

[0014] Preferably, in step c, the blank is clamped by a glazing fixture and dipped in glaze to apply matte glaze. The glazing fixture includes two clamping rods hinged to each other, a handle is provided at one end of the clamping rod, and two clamping heads are provided at the other end. The clamping heads are perpendicular to the clamping rods, and a silicone head is provided on the top of the clamping heads. When glazing, the clamping heads are extended to the inner side of the ring foot of the blank, and the clamping rods are stretched open so that the silicone head on the top of the clamping heads fits the inner side of the ring foot, thereby forming a clamping force on the blank. The blank is clamped by the glazing fixture and immersed in the glaze for glazing.

[0015] Preferably, in steps c and d, during drying, the blank is clamped by a glazing fixture and roasted and dried over a flame; in step e, the glazed blank is transferred to a support base by a glazing fixture, and the support base is provided with a plurality of support pins, and when the blank is placed on the support base, the support pins are supported on the inner side of the ring foot of the blank.

[0016] Preferably, in step e, a tunnel kiln is used for glaze firing, and the track of the firing zone of the tunnel kiln is provided with dense protrusions, and the kiln car generates vibration when passing through the track of the firing zone.

[0017] Preferably, in step d, a decolorizing glaze is applied to the entire inner surface of the blank and dried; in step f, the blank is aged by a tilting and rotating device, and the tilting and rotating device includes a rotating shaft, a motor for driving the rotating shaft to rotate, and an aging fixing clamp fixed on the rotating shaft. The rotating shaft is tilted. When the blank opening is clamped upward on the aging fixing clamp, acid is poured into the blank. The blank remains tilted and rotates with the rotating shaft, driving the acid to flow relative to the inner wall of the blank. The acid is replaced every 3-4 hours and lasts for 9-12 hours.

[0018] Preferably, in step d, a pattern is locally drawn on the outer surface of the blank using a fading glaze and then dried; and in step f, the outer surface of the blank is immersed in an acid solution for 10-12 hours.

[0019] From the above description, it can be seen that the high-temperature deformation-resistant antique glaze ceramics and the preparation method thereof provided by the present invention have the following beneficial effects: the alkali metal and alkaline earth metal impurity content of the sintered mullite contained in the green body is relatively high, which can significantly improve the deformation resistance of the green body; the composite additive composed of sintered mullite, white corundum and magnesium oxide can increase the mullite phase ratio in the green body, thereby improving the strength of the green body, and can improve the adaptability of the green body to the glaze, avoid cracking and deformation of the green body during high-temperature firing, and improve the yield rate; its glaze surface is an antique yellow glaze base color, and a whitish and faded texture is formed on it by acid aging, which has an antique and aged glaze effect, and through a special glazing method, the glaze surface has a high glaze fullness rate. As a ceramic handicraft, it has unique artistic beauty. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of glazing the high-temperature deformation-resistant antique glaze ceramics of the present invention.

[0021] Figure 2 This is a schematic diagram of the aging process of the high-temperature deformation-resistant antique glaze ceramics of the present invention. DETAILED DESCRIPTION

[0022] The present invention is further described below through specific embodiments.

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0024] As shown in the figure, the high-temperature, deformation-resistant antique-style glaze ceramic of the present invention comprises a body, the surface of which is sequentially covered with a matte glaze and a fading glaze. This body exhibits excellent high-temperature deformation resistance. Its glaze surface features an antique-style yellow base with a whitish, faded texture, creating an antique-style, aged glaze effect. As a ceramic craft, it possesses a unique artistic aesthetic.

[0025] The raw materials for the green body, measured in parts by weight, include the following components: 50-60 parts clay, 15-20 parts potassium feldspar, 8-10 parts sintered mullite, 5-7 parts white corundum, 3-5 parts magnesium oxide, 4-5 parts iron oxide, and 4-5 parts rutile. After firing, the green body exhibits a loess color. The sintered mullite, which contains high levels of alkali and alkaline earth metal impurities, significantly improves the body's deformation resistance. The composite additive consisting of sintered mullite, white corundum, and magnesium oxide increases the proportion of mullite in the green body, thereby increasing its strength and compatibility with glazes, preventing cracking and deformation during high-temperature firing, and improving yield.

[0026] The raw materials of matte glaze, calculated in parts by weight, include the following components: 20-25 parts of potassium feldspar, 5-8 parts of limestone, 25-30 parts of kaolin, 10-12 parts of lead oxide, 4-6 parts of tin dioxide, and 15-18 parts of quartz; the raw materials of fading glaze, calculated in parts by weight, include the following components: 20-25 parts of copper oxide, 10-12 parts of silicon dioxide, 10-12 parts of kaolin, and 15-20 parts of potassium feldspar. Matte glaze contains lead, which has a matte effect after firing. Combined with the color of the body, it gives the ceramic a base color with an antique yellow glaze effect. During the glaze firing process, the fading glaze and the matte glaze are integrated, and the copper oxide in the glaze lattice will decompose the lead ions. When the glaze surface encounters acid, the lead ions will fall off from the silicon oxide network of the glass. Since the single bond strength of Si-0 is strong and the single bond strength of Pb-O is low, the acid can break the Pb-0, causing the free lead on the network to dissolve into the solution. In the alkaline system, K-0 and Na-O are weaker and easily dissolved, leaving vacancies, which become the dissolution channel of lead, thereby causing the glaze surface to appear white and faded.

[0027] The preparation method of high-temperature deformation-resistant antique glaze ceramics comprises the following steps:

[0028] Step a, forming and drying the green container;

[0029] Step b, applying matte glaze on the surface of the green body and drying it;

[0030] Step c: locally applying a faded glaze on the matte glaze and drying it;

[0031] Step d, firing in a kiln;

[0032] Step e: applying acid to the glaze surface for aging treatment, and then cleaning to obtain a ceramic product.

[0033] In step a, after the green body is formed, the inner side surface of the ring foot 100 at the bottom of the green body is trimmed. After trimming, the inner side surface of the ring foot 100 has an inclined slope. After trimming, when viewed from a longitudinal cross-section, the ring foot 100 is narrow at the top and wide at the bottom. The inner side surface of the ring foot 100 tilts downward toward the center. Therefore, when the chuck 12 of the glazing fixture is clamped on the inner side surface of the ring foot 100, it can be restrained by the inner side surface of the ring foot 100, thereby ensuring that the green body will not fall off the glazing fixture during the glazing process.

[0034] like Figure 1In step c, the green body is clamped by a glazing fixture and dipped in glaze to apply matte glaze. The glazing fixture includes two mutually hinged clamping rods 11, one end of the clamping rod 11 is provided with a handle and the other end is provided with two clamping heads 12, the clamping heads 12 are perpendicular to the clamping rods 11, and the tops of the clamping heads 12 are provided with silicone heads. When glazing, the clamping heads 12 are extended to the inner side of the ring foot 100 of the green body, and the clamping rods 11 are stretched open so that the silicone heads on the tops of the clamping heads 12 fit into the inner side of the ring foot 100, thereby forming a clamping force on the green body. The green body is clamped by the glazing fixture and immersed in the glaze for glazing. Since the inner side surface of the ring foot 100 is an inclined surface, the silicone head on the top of the chuck 12 can clamp the inner side of the ring foot 100 to ensure that the glazing fixture firmly clamps the blank; different from the traditional glazing method, the side wall of the blank is directly clamped by the glazing fixture for dipping in glaze, which will leave traces of the clamping point on the side wall of the blank. Even if the clamping point is glazed later, traces will still be left. The present invention directly clamps the ring foot 100 with the glazing fixture for dipping in glaze. The clamping position is on the inner side of the ring foot 100, so the clamping point is hidden in the ring foot 100 and is not easy to be observed, thereby achieving a full glaze state on the glaze surface and making it more beautiful; in the subsequent glaze firing stage, since the glaze is fluid, the glaze will cover the traces of the chuck 12, and the position on the inner side of the ring foot 100 is not easy to be observed.

[0035] like Figure 1 During drying in steps c and d, the green body is held by a glazing fixture and flame-dried. In step e, the glazed green body is transferred to a firing stand using the glazing fixture. The firing stand is equipped with multiple support pins. When the green body is placed on the firing stand, the support pins are supported on the inside of the green body's foot ring 100. After each glazing, the green body's inner and outer glaze surfaces are flame-dried to initially set the glaze surface for the next glazing step. The support pins are located inside the foot ring 100 to minimize the support pin marks.

[0036] In step e, glaze firing is performed in a tunnel kiln. The kiln's firing zone has a track patterned with protrusions, which vibrate as the kiln cart passes over it. During high-temperature firing, the glaze remains fluid, and this liquid phase creates ripples. These small vibrations create ripples on the glaze surface.

[0037] like Figure 2In step d, a decolorizing glaze is applied to the entire inner surface of the blank and dried; in step f, the blank is aged by a tilting and rotating device, which includes a rotating shaft 21, a motor 22 for driving the rotating shaft 21 to rotate, and an aging fixing clamp 23 fixed on the rotating shaft 21. The rotating shaft 21 is tilted. When the blank opening is clamped on the aging fixing clamp 23 with the opening upward, acid is poured into the blank. The blank remains tilted and rotates with the rotating shaft 21, driving the acid to flow relative to the inner wall of the blank. The acid is replaced every 3-4 hours and lasts for 9-12 hours. The acid solution comprises the following components, measured by weight: 30-40 parts apple juice, 40-50 parts acetic acid, and 15-20 parts hydrochloric acid. After being soaked in the acid solution, the interior of the green body exhibits a fading and whitish appearance. Rotating the green body during soaking promotes acid flow along the inner wall, accelerating the fading rate. The amount of acid added is adjusted as needed; a greater amount results in a greater fading area. Because the green body remains in an inclined, rotating state, the bottom of the green body soaks in the acid solution longer than the top, resulting in more pronounced fading at the bottom. The angle of the rotating shaft 21 can be adjusted as needed to accommodate ceramics of varying specifications.

[0038] In step d, a pattern is locally painted on the outer surface of the blank using a fading glaze and then dried. In step f, the outer surface of the blank is immersed in an acid solution for 10-12 hours. Discoloration occurs on the localized pattern on the outer surface of the blank, forming a localized faded pattern.

[0039] The glaze surface prepared by the process of the present invention has an antique yellow glaze base color, and a whitish faded texture is formed thereon by acid aging, which has an antique glaze effect and is distributed with water ripples. The antique effect can be achieved without wood firing; and through a special glazing method, the glaze surface has a high glaze fullness rate. As a ceramic handicraft, it has unique artistic beauty.

[0040] The above are only some specific implementation methods of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. High temperature deformation resistant antique glaze ceramics, characterized by: The invention comprises a body, the surface of which is sequentially covered with a matte glaze and a fading glaze. The raw materials of the body, calculated in parts by weight, comprise the following components: 50-60 parts of clay, 15-20 parts of potassium feldspar, 8-10 parts of sintered mullite, 5-7 parts of white corundum, 3-5 parts of magnesium oxide, 4-5 parts of iron oxide, and 4-5 parts of rutile. The raw materials of the matte glaze, calculated in parts by weight, comprise the following components: 20-25 parts of potassium feldspar, 5-8 parts of limestone, 25-30 parts of kaolin, 10-12 parts of lead oxide, 4-6 parts of tin dioxide, and 15-18 parts of quartz. The raw materials of the fading glaze, calculated in parts by weight, comprise the following components: 20-25 parts of copper oxide, 10-12 parts of silicon dioxide, 10-12 parts of kaolin, and 15-20 parts of potassium feldspar. After the ceramic is fired, an acid solution is added to the glaze surface for aging treatment.

2. The method for preparing high-temperature deformation-resistant antique glaze ceramics according to claim 1, characterized in that: The steps include: Step a, forming and drying the green body; Step b, applying matte glaze on the surface of the green body and drying it; Step c: locally applying a faded glaze on the matte glaze and drying it; Step d, firing in a kiln; Step e: applying acid to the glaze surface for aging treatment, and then cleaning to obtain a ceramic product.

3. The method for preparing high-temperature deformation-resistant antique glaze ceramics according to claim 2, characterized in that: In the step a, after the blank is formed, the inner side surface of the ring foot at the bottom of the blank is trimmed, and after the trimming, the inner side surface of the ring foot has an inclined slope.

4. The method for preparing high-temperature deformation-resistant antique glaze ceramics according to claim 3, characterized in that: In step b, the blank is clamped by a glazing fixture and dipped in glaze to apply matte glaze. The glazing fixture includes two clamping rods hinged to each other, a handle is provided at one end of the clamping rod and two clamping heads are provided at the other end. The clamping heads are perpendicular to the clamping rods, and a silicone head is provided on the top of the clamping heads. When glazing, the clamping heads are extended to the inner side of the ring foot of the blank, and the clamping rods are stretched open so that the silicone head on the top of the clamping heads fits the inner side of the ring foot, thereby forming a clamping force on the blank. The blank is clamped by the glazing fixture and dipped into the glaze for glazing.

5. The method for preparing high-temperature deformation-resistant antique glaze ceramics according to claim 3, characterized in that: In the steps b and c, during drying, the green body is clamped by a glazing fixture and roasted and dried over a flame; in the step d, the glazed green body is transferred to a support base by a glazing fixture, and the support base is provided with a plurality of support pins. When the green body is placed on the support base, the support pins are supported on the inner side of the ring foot of the green body.

6. The method for preparing high-temperature deformation-resistant antique glaze ceramics according to claim 2, characterized in that: In the step d, a tunnel kiln is used for glaze firing, and the track of the firing zone of the tunnel kiln is provided with dense protrusions, and the kiln car generates vibration when passing through the track of the firing zone.

7. The method for preparing high-temperature deformation-resistant antique glaze ceramics according to claim 2, characterized in that: In the step c, a decolorizing glaze is applied to the entire inner surface of the blank and dried; in the step e, the blank is aged by means of a tilting and rotating device, the tilting and rotating device comprising a rotating shaft, a motor for driving the rotating shaft to rotate, and an aging fixing clamp fixed on the rotating shaft, the rotating shaft being tilted, when the blank opening is clamped on the aging fixing clamp upward, acid is poured into the blank, the blank remains tilted and rotates with the rotating shaft, driving the acid to flow relative to the inner wall of the blank, and the acid is replaced every 3-4 hours for 9-12 hours.

8. The method for preparing high-temperature deformation-resistant antique glaze ceramics according to claim 2, characterized in that: In the step c, a pattern is drawn locally on the outer surface of the blank by using a fading glaze and then drying the pattern; in the step e, the outer surface of the blank is immersed in an acid solution for 10-12 hours.

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